Android Question Passing values between activities

Erel

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• Jan 22, 2014

• #2

You do not need to create a singleton for that. You can use Process_Global variables to share data or better use CallSubDelayed.

 

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davepamn

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• Jan 22, 2014

• #3

Erel said:

You do not need to create a singleton for that. You can use Process_Global variables to share data or better use CallSubDelayed.

Click to expand...

Public sGlobalFactory as string

This variable does not seem to be visible in the second activity. Did I declare the variable properly?

 

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davepamn

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• Jan 22, 2014

• #4

Parsing code. Error
Error parsing program.
Error description: Undeclared variable 'sglobalfactory' is used before it was assigned any value.

 

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davepamn

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• Jan 22, 2014

• #5

Sub cmdEnter_Down
StartActivity(frmSetup)
CallSubDelayed2(frmSetup,"SetFactory",sGlobalFactory)
End Sub


'******in frmSetup

Sub SetFactory(sValue As String)
sCurrentFactory=sValue
End Sub

The process seems difficult

Is there a better way?

 

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Erel

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• Jan 23, 2014

• #6

Public sGlobalFactory as string

This variable does not seem to be visible in the second activity. Did I declare the variable properly?

Click to expand...

You need to access it with the module name.

For example:

B4X:

Main.sGlobalFactory = "Asd"

 

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davepamn

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• Jan 23, 2014

• #7

thanks

 

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netsistemas

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• Apr 28, 2020

• #8

I use this thenic:
Create a PUBLIC VAR in Process_Global (frmUsuario activity sample)

B4X:

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Type TD_Usuario(Codigo As Int, Nombre As String, Clave As String)
    Public AccionEnForm As String
End Sub

and in other activity, BEFORE CALL THIS activity somethink like this:

B4X:

    frmUsuario.AccionEnForm = "SetUsuario"
    StartActivity(frmUsuario)

And use this public var in frmUsuario activity.

You can returns values as this thecnic.
Be carefour with this PUBLIC var between other calls.
ALWAYS put somenthig in other calls to this Activity

B4X:

    frmUsuario.AccionEnForm = "nothingtodo"
    StartActivity(frmUsuario)

 

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